# \#trixi

**URL:** https://discourse.julialang.org/tag/trixi/1694.md

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## [Trixi.jl unable to convert elixir\_advection\_diffusion.jl 2d example into 1d example](https://discourse.julialang.org/t/trixi-jl-unable-to-convert-elixir-advection-diffusion-jl-2d-example-into-1d-example/133305)

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**Author:** [@mra](https://discourse.julialang.org/u/mra)\
**Replies:** 3\
**Last updated:** [October 21, 2025, 2:12pm UTC](https://discourse.julialang.org/t/trixi-jl-unable-to-convert-elixir-advection-diffusion-jl-2d-example-into-1d-example/133305 "2025-10-21T14:12:04Z")

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I am trying to create working 1d advection diffusion example with boundaries. I have first modified slightly code from Trixi.jl/examples/dgmulti\_2d/elixir\_advection\_diffusion.jl at main · trixi-framework/Trixi.jl and con…

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## [How to use Trixi Adaptive Mesh Refinement Indicators?](https://discourse.julialang.org/t/how-to-use-trixi-adaptive-mesh-refinement-indicators/132747)

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**Author:** [@mra](https://discourse.julialang.org/u/mra)\
**Replies:** 3\
**Last updated:** [October 9, 2025, 12:19pm UTC](https://discourse.julialang.org/t/how-to-use-trixi-adaptive-mesh-refinement-indicators/132747 "2025-10-09T12:19:28Z")

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I have followed the tutorial at 15 Adaptive mesh refinement · Trixi.jl and have tried different indicators on this problem: IndicatorMax, IndicatorLöhner and IndicatorHennemannGassner. IndicatorLöhner does the opposite …

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## [How to extract solution when using Trixi.jl](https://discourse.julialang.org/t/how-to-extract-solution-when-using-trixi-jl/132512)

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**Author:** [@mra](https://discourse.julialang.org/u/mra)\
**Replies:** 3\
**Last updated:** [September 19, 2025, 1:41pm UTC](https://discourse.julialang.org/t/how-to-extract-solution-when-using-trixi-jl/132512 "2025-09-19T13:41:37Z")

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I have trouble extracting the solution in a format of points where each point stores (x, u) where x is the coordinate (position) and u is the value at that position. Even though I can extract the coordinates x and value…

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## [Solving the Boltzmann transport equation using Trixi.jl](https://discourse.julialang.org/t/solving-the-boltzmann-transport-equation-using-trixi-jl/132509)

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**Author:** [@drandran12](https://discourse.julialang.org/u/drandran12)\
**Replies:** 4\
**Last updated:** [September 19, 2025, 12:35pm UTC](https://discourse.julialang.org/t/solving-the-boltzmann-transport-equation-using-trixi-jl/132509 "2025-09-19T12:35:58Z")

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I need to solve the two spatial dimensional Boltzmann transport equation of the form: \\left\[\\partial\_t+\\vec{k} \\cdot \\vec{\\nabla}\_x-\\vec{\\nabla}\_x V \\cdot \\vec{\\nabla}\_k\\right\] n(\\vec{x}, t, \\vec{k})=-4 \\Gamma\_a \\int \\…

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## [Solving 2D PDE similar to advection-diffusion on unstructured mesh with Trixi](https://discourse.julialang.org/t/solving-2d-pde-similar-to-advection-diffusion-on-unstructured-mesh-with-trixi/125462)

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**Author:** [@Liris](https://discourse.julialang.org/u/Liris)\
**Replies:** 6\
**Last updated:** [February 5, 2025, 5:41pm UTC](https://discourse.julialang.org/t/solving-2d-pde-similar-to-advection-diffusion-on-unstructured-mesh-with-trixi/125462 "2025-02-05T17:41:52Z")

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Dear all, I am trying to solve the following equation: \\frac{\\partial \\phi}{\\partial t} + \\nabla\\cdot(\\phi \\boldsymbol{u}) - \\frac{\\partial}{\\partial z} \\left\[\\mathcal{F} \\phi(1-\\phi)\\right\] = \\nabla \\cdot (\\mathcal{D}…

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## [SciMLSensitivity.jl Precompile error because of Enzyme](https://discourse.julialang.org/t/scimlsensitivity-jl-precompile-error-because-of-enzyme/122561)

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**Author:** [@erny123](https://discourse.julialang.org/u/erny123)\
**Replies:** 11\
**Last updated:** [November 12, 2024, 10:00pm UTC](https://discourse.julialang.org/t/scimlsensitivity-jl-precompile-error-because-of-enzyme/122561 "2024-11-12T22:00:20Z")

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Edit: Issue opened with Trixi.jl Trixi forcing downgrades when using Enzyme.jl, Zygote.jl, SciMLsensitivity.jl · Issue #2157 · trixi-framework/Trixi.jl Trying to follow along this the SciMLSensitivity.jl tutorial: Pa…